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const BABEL_ENV = process.env.BABEL_ENV || process.env.NODE_ENV || null;
const presets = [
[
'@babel/preset-env',
{
modules: false,
targets: {
ie: '11',
},
},
],
];
// include stage 3 proposals
const plugins = [
'@babel/plugin-syntax-dynamic-import',
'@babel/plugin-syntax-import-meta',
'@babel/plugin-proposal-class-properties',
'@babel/plugin-proposal-json-strings',
];
// add code coverage tooling if necessary
if (BABEL_ENV === 'coverage') {
plugins.push([
'babel-plugin-istanbul',
{
exclude: ['spec/javascripts/**/*', 'app/assets/javascripts/locale/**/app.js'],
},
]);
}
// add rewire support when running tests
if (BABEL_ENV === 'karma' || BABEL_ENV === 'coverage') {
plugins.push('babel-plugin-rewire');
}
// Jest is running in node environment
if (BABEL_ENV === 'jest') {
plugins.push('transform-es2015-modules-commonjs');
plugins.push('dynamic-import-node');
}
module.exports = { presets, plugins };
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